build: improve docker build step

[viceice]

Changes

• use modern syntax
• use hardlinks to speedup builds
• download node from github (nodejs.org is flaky)

Docker build step is down to ~1:30min from ~5 min

Context

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This issue has been resolved in version 37.440.4 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 37.440.4

Your semantic-release bot 📦🚀